Order fellow to be brought into company doctor (7)
I believe the answer is:
command
'order' is the definition.
(I've seen this before)
'fellow to be brought into company doctor' is the wordplay.
'fellow' becomes 'man' (I've seen this before**).
'to be brought into' indicates putting letters inside.
'company' becomes 'co' (abbreviation).
'doctor' becomes 'md' ('MD' can be a synonym of 'doctor').
'co'+'md'='comd'
'man' placed into 'comd' is 'COMMAND'.
(Other definitions for command that I've seen before include "Authoritative instruction" , "Fiat" , "Bid" , "Instruction, order" , "Direct" .)